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PATH: opt / alt / python311 / include / python3.11 / internal

#ifndef Py_INTERNAL_LONG_H
#define Py_INTERNAL_LONG_H
#ifdef __cplusplus
extern "C" {
#endif

#ifndef Py_BUILD_CORE
#  error "this header requires Py_BUILD_CORE define"
#endif

#include "pycore_global_objects.h"  // _PY_NSMALLNEGINTS
#include "pycore_runtime.h"       // _PyRuntime

/*
 * Default int base conversion size limitation: Denial of Service prevention.
 *
 * Chosen such that this isn't wildly slow on modern hardware and so that
 * everyone's existing deployed numpy test suite passes before
 * https://github.com/numpy/numpy/issues/22098 is widely available.
 *
 * $ python -m timeit -s 's = "1"*4300' 'int(s)'
 * 2000 loops, best of 5: 125 usec per loop
 * $ python -m timeit -s 's = "1"*4300; v = int(s)' 'str(v)'
 * 1000 loops, best of 5: 311 usec per loop
 * (zen2 cloud VM)
 *
 * 4300 decimal digits fits a ~14284 bit number.
 */
#define _PY_LONG_DEFAULT_MAX_STR_DIGITS 4300
/*
 * Threshold for max digits check.  For performance reasons int() and
 * int.__str__() don't checks values that are smaller than this
 * threshold.  Acts as a guaranteed minimum size limit for bignums that
 * applications can expect from CPython.
 *
 * % python -m timeit -s 's = "1"*640; v = int(s)' 'str(int(s))'
 * 20000 loops, best of 5: 12 usec per loop
 *
 * "640 digits should be enough for anyone." - gps
 * fits a ~2126 bit decimal number.
 */
#define _PY_LONG_MAX_STR_DIGITS_THRESHOLD 640

#if ((_PY_LONG_DEFAULT_MAX_STR_DIGITS != 0) && \
   (_PY_LONG_DEFAULT_MAX_STR_DIGITS < _PY_LONG_MAX_STR_DIGITS_THRESHOLD))
# error "_PY_LONG_DEFAULT_MAX_STR_DIGITS smaller than threshold."
#endif

/* runtime lifecycle */

extern PyStatus _PyLong_InitTypes(PyInterpreterState *);
extern void _PyLong_FiniTypes(PyInterpreterState *interp);

/* other API */

#define _PyLong_SMALL_INTS _Py_SINGLETON(small_ints)

// _PyLong_GetZero() and _PyLong_GetOne() must always be available
// _PyLong_FromUnsignedChar must always be available
#if _PY_NSMALLPOSINTS < 257
#  error "_PY_NSMALLPOSINTS must be greater than or equal to 257"
#endif

// Return a borrowed reference to the zero singleton.
// The function cannot return NULL.
static inline PyObject* _PyLong_GetZero(void)
{ return (PyObject *)&_PyLong_SMALL_INTS[_PY_NSMALLNEGINTS]; }

// Return a borrowed reference to the one singleton.
// The function cannot return NULL.
static inline PyObject* _PyLong_GetOne(void)
{ return (PyObject *)&_PyLong_SMALL_INTS[_PY_NSMALLNEGINTS+1]; }

static inline PyObject* _PyLong_FromUnsignedChar(unsigned char i)
{
    return Py_NewRef((PyObject *)&_PyLong_SMALL_INTS[_PY_NSMALLNEGINTS+i]);
}

PyObject *_PyLong_Add(PyLongObject *left, PyLongObject *right);
PyObject *_PyLong_Multiply(PyLongObject *left, PyLongObject *right);
PyObject *_PyLong_Subtract(PyLongObject *left, PyLongObject *right);

/* Used by Python/mystrtoul.c, _PyBytes_FromHex(),
   _PyBytes_DecodeEscape(), etc. */
PyAPI_DATA(unsigned char) _PyLong_DigitValue[256];

/* Format the object based on the format_spec, as defined in PEP 3101
   (Advanced String Formatting). */
PyAPI_FUNC(int) _PyLong_FormatAdvancedWriter(
    _PyUnicodeWriter *writer,
    PyObject *obj,
    PyObject *format_spec,
    Py_ssize_t start,
    Py_ssize_t end);

PyAPI_FUNC(int) _PyLong_FormatWriter(
    _PyUnicodeWriter *writer,
    PyObject *obj,
    int base,
    int alternate);

PyAPI_FUNC(char*) _PyLong_FormatBytesWriter(
    _PyBytesWriter *writer,
    char *str,
    PyObject *obj,
    int base,
    int alternate);

#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_LONG_H */

[+] ..
[-] pycore_runtime.h [edit]
[-] pycore_call.h [edit]
[-] pycore_symtable.h [edit]
[-] pycore_bytes_methods.h [edit]
[-] pycore_floatobject.h [edit]
[-] pycore_pystate.h [edit]
[-] pycore_pymath.h [edit]
[-] pycore_unionobject.h [edit]
[-] pycore_ast_state.h [edit]
[-] pycore_tuple.h [edit]
[-] pycore_emscripten_signal.h [edit]
[-] pycore_sysmodule.h [edit]
[-] pycore_frame.h [edit]
[-] pycore_hashtable.h [edit]
[-] pycore_strhex.h [edit]
[-] pycore_interp.h [edit]
[-] pycore_dict.h [edit]
[-] pycore_runtime_init.h [edit]
[-] pycore_gil.h [edit]
[-] pycore_global_strings.h [edit]
[-] pycore_interpreteridobject.h [edit]
[-] pycore_atomic.h [edit]
[-] pycore_initconfig.h [edit]
[-] pycore_context.h [edit]
[-] pycore_pymem.h [edit]
[-] pycore_compile.h [edit]
[-] pycore_parser.h [edit]
[-] pycore_function.h [edit]
[-] pycore_getopt.h [edit]
[-] pycore_global_objects.h [edit]
[-] pycore_typeobject.h [edit]
[-] pycore_gc.h [edit]
[-] pycore_pyarena.h [edit]
[-] pycore_bytesobject.h [edit]
[-] pycore_dtoa.h [edit]
[-] pycore_pathconfig.h [edit]
[-] pycore_format.h [edit]
[-] pycore_structseq.h [edit]
[-] pycore_object.h [edit]
[-] pycore_import.h [edit]
[-] pycore_pyhash.h [edit]
[-] pycore_fileutils.h [edit]
[-] pycore_code.h [edit]
[-] pycore_pyerrors.h [edit]
[-] pycore_list.h [edit]
[-] pycore_unicodeobject.h [edit]
[-] pycore_sliceobject.h [edit]
[-] pycore_namespace.h [edit]
[-] pycore_warnings.h [edit]
[-] pycore_bitutils.h [edit]
[-] pycore_asdl.h [edit]
[-] pycore_abstract.h [edit]
[-] pycore_blocks_output_buffer.h [edit]
[-] pycore_exceptions.h [edit]
[-] pycore_traceback.h [edit]
[-] pycore_opcode.h [edit]
[-] pycore_ucnhash.h [edit]
[-] pycore_moduleobject.h [edit]
[-] pycore_pylifecycle.h [edit]
[-] pycore_atomic_funcs.h [edit]
[-] pycore_ceval.h [edit]
[-] pycore_accu.h [edit]
[-] pycore_signal.h [edit]
[-] pycore_condvar.h [edit]
[-] pycore_hamt.h [edit]
[-] pycore_long.h [edit]
[-] pycore_ast.h [edit]
[-] pycore_genobject.h [edit]